* fix: cloudflare turnstile token reset
* fix: silently reset turnstile on invalid token error
* refactor: remove unused forwardRef logic from Turnstile component
- Remove forwardRef, useImperativeHandle, and useRef imports
- Remove unused TurnstileInstance type export
- Simplify to a plain function component
- The ref-based reset was replaced by key-based remount in signup-view
* refactor: remove redundant cfToken validation check
The submit button is already disabled when cfToken is missing,
making this defensive check unreachable during normal form flow.
* revert prettier formatiing
* chore: revert yarn.lock changes
* refactor(auth): use shared constant for cloudflare token error message
Replace hardcoded "Invalid cloudflare token" string with an exported
constant to prevent silent breakage if the error message changes.
